Just an estimate, but I have somewhere around 2,000 colorants, from companies all over the world. They are either powders or dispersions.
Some of them are similar in color (there are only so many shades/tints of any given color), but even so, they give different effects once added to any carrier.
One of the powders I have, is in a gallon size jar, and is a red/gold/orange chameleon.
There was also a red metallic that Cadillac used several years ago, that I have a big canister of. It was manufactured in Japan, and when Japan was devastated by the hurricane, it wasn't available for quite some time.
I have many specialty colors like these, that are no longer available.
Sometime, when I have nothing to do
, I'll lay them out and get a photo. Don't expect much from the photo. Looking at my past posts of photos, will explain it.